Is there a special diet I should eat to lose belly fat?

No, you can eat anything you want as long as you do not pile up the calories. However, common sense indicates that a healthy diet is important.  There should be no more junk food or high calorie foods in the diet. Learn to read labels, replace your diet with fruits, vegetables, and unsaturated fats. Increase portions of complex carbohydrates and reduce simple carbohydrates like white bread and refined pasta. Further, decrease the portion size or eat several small meals 5-6 times a day. Finally, drink water or fruit juices. 

There is no need to buy any books to follow this simple advice. The majority of dietary books on weight loss are frauds, offer advice which is not practical and just add up as junk in the home or as a replacement for firewood. Read less and start walking today if you want to lose weight.